Meaning of ENERGY in English

n. (pl. -ies) 1 force, vigour; capacity for activity. 2 (in pl.) individual powers in use (devote your energies to this). 3 Physics the capacity of matter or radiation to do work. 4 the means of doing work by utilizing matter or radiation.

[ F énergie or LL energia f. Gk energeia f. ergon work ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.